"But we know there is a certain amount of regulatory uncertainty, so we're trying to put some thoughts out on the table and get reaction."

In the short term, the rules may sting the Bell companies, whose shares have already been languishing because of regulatory uncertainty.

A. One is that you have a tremendous amount of regulatory uncertainty as regulatory tries to catch up with the moves in technology.

Biotechnology executives said the report could reduce the regulatory uncertainty and help them bring products to market faster.

Special protocol assessments provide valuable information for sponsors, significantly reducing regulatory uncertainty and business risks in drug development.

That will help guard against regulatory uncertainties - or fund acquisitions.

One question is whether either new entrants or incumbents will be willing to negotiate during a time of regulatory uncertainty.

This reform must be staged over time to realign these systems to support broadband and minimize regulatory uncertainty for investment.

Even under these favorable circumstances, the regulatory uncertainty threatening the large-scale investment needed for a nuclear plant will require some government assistance.

G.M. acknowledged that a number of technical, regulatory and market uncertainties had not been cleared up.